Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
van nham » van nam, van nhan, van tham
hieu van » hieu va, thien van, lieu va
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
sach v » sach va, sach 2, sach vay
vi cua » vai cua, di cua
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach v) or (sach y)) nang x ho. hieu van nham thuc ((va hanh) OR (va danh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach v) OR (sach y)) nang x ho. hieu van nham thuc ((va hanh) OR (va danh)) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach v) or (sach y)) nang x ho. hieu van nham thuc ((va hanh) OR (va danh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: su ((sach v) or (sach y)) nang x ho. hieu van nham thuc ((va hanh) OR (va danh)) vi cua te*.